[LU-15456] deadlock in ll_new_node() when running racer

• Type: Bug
• Resolution: Fixed
• Priority: Blocker
• Fix Version/s: Lustre 2.15.0
• Affects Version/s: Lustre 2.14.0, Lustre 2.15.0
• Severity: 3
• Assignee: Lai Siyao
• Reporter: Lai Siyao

Description

ll_new_node() will call ll_dir_getstripe() to fetch parent default LMV if md_create() returns -EREMOTE, but it doesn't call ll_finish_md_op_data() to unlock lli_lsm_sem before ll_dir_getstripe(), which will cause deadlock because the ll_dir_getstripe() will lock lli_lsm_sem again.

Comments

[Peter Jones]

Landed for 2.15

[Gerrit Updater]

"Oleg Drokin <[e-mail]>" merged in patch https://review.whamcloud.com/46157/
Subject: LU-15456 llite: deadlock in ll_new_node()
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: 1ce2fee3156858e132dbc1c90f72a32f526de988

[Gerrit Updater]

"Lai Siyao <[e-mail]>" uploaded a new patch: https://review.whamcloud.com/46157
Subject: LU-15456 llite: deadlock in ll_new_node()
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: d46e8deb9c0e680e195ef4d2c8755f25ad27865f